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/kloc-how much is the 0/0 mu glass shed?
The installation cost of glass greenhouse is generally around 55 yuan/square meter, and the transportation cost is around 5 yuan/square meter according to the distance. The profit of enterprise management fee is generally around 10%, that is, 30~40 yuan/m2. At present, the profit margin of the greenhouse industry is not high, the greenhouse installation labor is large, and there are certain safety risks when working at high altitude for a long time.
Extended data:
Temperature conditions:
Plastic film has the function of heat insulation. After film mulching, the turbidity in the greenhouse will increase with the increase of external temperature and decrease with the decrease of external temperature. Seasonal changes are obvious, and the temperature difference between day and night is large. The lower the temperature, the greater the temperature difference. Generally, the daily warming of greenhouse in cold season can reach 3-6℃, and the warming capacity in cloudy days or at night is only 1-2℃.
In warm spring, the temperature difference between the shed and the open field gradually increases, and the temperature rise can reach 6- 15℃. When the outside temperature rises, the temperature in the greenhouse will rise relatively, reaching above 20℃ at the highest. Therefore, there is a danger of high temperature and freezing in the greenhouse, which needs manual adjustment. In the high temperature season, the high temperature above 50℃ can be generated in the shed.
The whole shed is ventilated, and the outside of the shed is covered with a straw curtain or a "arbor", which is lower than the outdoor temperature 1-2℃. On sunny days in winter, the lowest temperature at night is 1-3℃ higher than that in the open field, and on cloudy days, several items are the same as those in the open field. Therefore, the main production seasons of greenhouses are spring, summer and autumn. The greenhouse temperature can be kept at 15-30℃ by heat preservation and ventilation.
Baidu encyclopedia-greenhouse
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